China Railway Eryuan Engineering Group Co Ltd (CREEC), which is involved in the engineering survey and design of world's one of the most difficult railway lines -- Sichuan-Tibet railway, has expressed its interest to take part in survey and design of a cross-border railway link construction project between Nepal and China. 

High and medium-speed rail services are expected to connect 10 major cities between Kunming in China and Singapore. But negotiations with seven Southeast Asian countries are testing Beijing's "railway diplomacy."